Look:
We call wait_event() , condition is FALSE at the moment :
do {
if (condition)
break;
/* and here we have condition changed to TRUE */
/* process is NOT in any wait queue yet */
/* then unroll __wait_event(wq, condition); */
do { DEFINE_WAIT(__wait); for (;;) {
prepare_to_wait(&wq, &__wait, TASK_UNINTERRUPTIBLE);
/* at this point condition is TRUE , process is in a wait queue
and its state is
TASK_UNINTERRUPTIBLE. If rescheduling happens now the
process will asleep,
despite of condition is TRUE . And will not be woken up until
next wake_up happens
Is that correct ? */
if (condition) break;
schedule();
}
finish_wait(&wq, &__wait);
} while (0)
/* end of unroll __wait_event*/
} while (0)
_________________________________________________________________
Express yourself instantly with MSN Messenger! Download today it's FREE!
http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
